CN1833233A - Record regeneration device, data processing device and record regeneration processing system - Google Patents

Record regeneration device, data processing device and record regeneration processing system Download PDF

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Publication number
CN1833233A
CN1833233A CNA2003801001957A CN200380100195A CN1833233A CN 1833233 A CN1833233 A CN 1833233A CN A2003801001957 A CNA2003801001957 A CN A2003801001957A CN 200380100195 A CN200380100195 A CN 200380100195A CN 1833233 A CN1833233 A CN 1833233A
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China
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information
key
unique
record
recording medium
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CNA2003801001957A
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CN100524253C (en
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木古聪
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Sony Corp
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Sony Corp
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00094—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers
    • G11B20/00115—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers wherein the record carrier stores a unique medium identifier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00217—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
    • G11B20/00253—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier
    • G11B20/00362—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier the key being obtained from a media key block [MKB]

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • Technology Law (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Storage Device Security (AREA)

Abstract

The invention relates to a recording and reproducing device, a dtat processing device, and a data recording, reproducing, and processing system. A device key 46 is implemented on a drive 4 side. To securely transmit the device key 46 to a host 5, the device key 46 is encrypted with a bus key. The host 5 side decrypts the device key with the bus key. A medium unique key calculating block 55 calculates a medium unique key with an MKB 12, a medium ID, and the decrypted device key 46. When the calculated medium key is a predetermined value, the drive 4 is revoked and the process is stopped. The medium unique key is supplied to an encrypting/decrypting module 54. A content key is obtained with an encrypted title key 14 and a CCI 15. With the content key, an encrypted content is decrypted and a content that is recorded is encrypted.

Description

Record and transcriber, data processing equipment and record, reproduction and disposal system
Technical field
The present invention relates to record and transcriber, data processing equipment and record, reproduction and disposal system, these devices and system for example make on the dish medium of driver in being encased in driver that is connected to personal computer the recording of encrypted content and from coiling the media reproducing encrypted content.
Background technology
Can write down the Large Volume Data that is used for a film on such as the recording medium of DVD (digital multi-purpose disk), as numerical information, wherein, DVD just develops in recent years.When video information etc. can be recorded as numerical information, the copyright of protection numerical information was in order to avoid just become important by illegal copies.
In the DVD video,, adopted CSS (content scramble system) for the Copy Protection technology.CSS only allows to be used for dvd media, because of the CSS contract can not be used for recordable DVD such as DVD-R, DVD-RW, DVD+R, DVD+RW etc.Thereby the CSS contract does not allow the user that the content of DVD video disc is copied to (so-called bit-by-bit copy) on the recordable DVD.
Yet, the ruined serious situation of CSS encryption system is arranged.Issuing the illegal software that is called " DeCSS " on the Internet, this software is decrypted and decryption content is copied on the hard disk the content of encrypting according to the CSS encryption system easily.The background that " DeCSS " occur is to reproduce software with the design of CSS decryption key, can prevent to alter though this decryption key is thought, in fact can not prevent to alter.Carry out reverse-engineering and encrypting key is decrypted reproducing software.As a result, all CSS algorithms are decrypted.
Succession for CSS; CPPM (prerecorded medium content protecting) and CRPM (recordable media content protecting) have been proposed; wherein, CPPM is the copyright protection technology that is used for DVD-ROM such as DVD audio disc, and CRPM is the copyright protection technology that is used for recordable DVD and memory card.In these systems, even have and relevant problems such as content-encrypt, management information storage, system also can be updated.Even the data of whole dish are copied, also can restrict reproduction.The method that is used to protect the DVD copyright is described in following non-patent correlation technique list of references 1.CRPM following by its permission person 4C Entity, LLC, the U.S. is described in the document of issue.
" begin to launch copyright protection space (Spreading-out CopyrightProtection Space Starting from DVD) ", Yamada, Nikkei Electronics, 143-153, August 13 calendar year 2001 from DVD.
" content protecting (Content Protectionfor Recordable Media Specification DVD Book) that is used for recordable media standard DVD volume ", the Internet＜URL:http: //www.4Centrity.com/ 〉
In personal computer (the following PC that abbreviates as sometimes) environment, because PC is connected with standard interface with driver, therefore, in standard interface, secret data is leaked or is altered.As a result, following risk is arranged: can carry out reverse-engineering to using software, and secret information is got by key or altered.In the electronic installation that is integrated with record and transcriber, this risk takes place hardly.
When the application program carried out being implemented copyright protection technology when preventing that copyright protection technology is analyzed on PC, application program generally can prevent to be altered.Yet, do not represent the index of its tamper-proof capabilities.As a result, the decision-making and the ability that depend on each implementer at the countermeasure of reverse-engineering.As a result, CSS is destroyed.For copyright protection technology, be used for the CPPM etc. of DVD-ROM and be used for the CRPM of recordable DVD, propose to allow to solve and software is carried out the engineering method of relevant problem on PC, wherein, CPPM and CRPM propose as the succession of CSS.
Summary of the invention
The objective of the invention is under the PC environment, to guarantee the security of copyright protection technology.In other words, the purpose of this invention is to provide following record and transcriber, data processing equipment and record, reproduction and disposal system, described device and system prevent to produce without the driver of effectively authorizing and allow it to be cancelled safely.
A first aspect of the present invention is a kind of record and transcriber, comprising:
In recording section and the reproducing part at least one, wherein, recording section is used for recording of encrypted data on recording medium, and reproducing part is used to reproduce the enciphered data that is recorded on the recording medium, and recording medium has its unique first information;
Storage area, this part are used to store unique second information of distributing to effective electron device or effective application software; And
The key that the coupling part that is used for mutual verification msg treating apparatus, data processing equipment utilization produce according to the unique first information of recording medium and second information in the storage area that is stored in and enciphered data or enciphered data deciphered at least.
A second aspect of the present invention is a kind of record and transcriber,
Wherein, data processing equipment has the cancellation processing section, second information in being stored in storage area is not to the effective electron device or effectively during the unique information of application software, the cancellation processing section utilizes second information that is stored in the storage area and the unique first information of recording medium at least and carries out cancellation, and
Wherein, the coupling part is configured to second information that is stored in the storage area is sent to data processing equipment.
A third aspect of the present invention is a kind of record and transcriber, further comprises:
The cancellation processing section, wherein, second information in being stored in storage area is not to the effective electron device or effectively during the unique information of application software, and the cancellation processing section utilizes second information that is stored in the storage area and the unique first information of recording medium and carries out cancellation.
A fourth aspect of the present invention is a kind of record and transcriber, comprising:
In recording section and the reproducing part at least one, wherein, recording section is used for recording of encrypted data on recording medium, and reproducing part is used to reproduce the enciphered data that is recorded on the recording medium, and recording medium has its unique first information;
Storage area, this part are used to store unique second information of distributing to effective electron device or effective application software;
The key that the coupling part that is used for mutual verification msg treating apparatus, data processing equipment utilization produce according to the unique first information of recording medium and second information in the storage area that is stored in and enciphered data or enciphered data deciphered at least; And
The cancellation processing section, second information in being stored in storage area is not to the effective electron device or effectively during the unique information of application software, the cancellation processing section utilizes second information and the unique first information of recording medium and carries out cancellation, wherein, second information sends by the coupling part at least from data processing equipment, and is stored in the storage area.
A fifth aspect of the present invention is a kind of data processing equipment, comprising:
Be used for verifying mutually the coupling part of record and transcriber, record and transcriber are used on recording medium the recording of encrypted data at least or reproduce enciphered data from it, and recording medium has only uniquely distributes to second information of effective electron device or effective application software and to its unique first information; And
The processing section, this part is utilized the key that produces according to the first information and electronic installation or the second unique information of application software and enciphered data or enciphered data deciphered at least, wherein, the first information to recording medium be unique and from the record and transcriber send by the coupling part.
A sixth aspect of the present invention is a kind of data processing equipment,
Wherein, data processing equipment has the cancellation processing section, when second information is not that the cancellation processing section utilizes from record and transcriber and carries out cancellation by second information and the unique first information of recording medium of coupling part transmission to the effective electron device or effectively during the unique information of application software.
A seventh aspect of the present invention is a kind of data processing equipment,
Wherein, data processing equipment is connected to record and the transcriber with cancellation processing section, when second information that stores is not to the effective electron device or effectively during the unique information of application software, the cancellation processing section utilizes second information that is stored at least in record and the transcriber and the unique first information of recording medium and carries out cancellation.
A eighth aspect of the present invention is a kind of data processing equipment, comprising:
Storage area, this part are used to store only unique second information of distributing to the effective electron device;
Be used for the mutually coupling part of checking record and transcriber, write down and transcriber is used for being recorded in enciphered data on the recording medium in recording of encrypted data or reproduction on the recording medium at least, recording medium has its unique first information; And
The key that processing section, this part utilization produce according to the unique first information of recording medium and second information in the storage area that is stored in and enciphered data or to the enciphered data deciphering at least,
Wherein, second information that is stored in the storage area sends to record and the transcriber with cancellation processing section, second information in being stored in storage area is not that cancellation is carried out in the cancellation processing section to the effective electron device or effectively during the unique information of application software.
A ninth aspect of the present invention is a kind of record, reproduction and disposal system, comprising:
Record and transcriber, this device is used for being recorded in enciphered data on the recording medium in recording of encrypted data or reproduction on the recording medium at least, recording medium has its unique first information, and record and transcriber have unique second information of distributing to effective electron device or effective application software; And
Data processing equipment, this device utilize the key that produces according to second information and the unique first information of recording medium and enciphered data or to the enciphered data deciphering, wherein, second information is stored in record and the transcriber at least at least.
A tenth aspect of the present invention is a kind of record, reproduction and disposal system,
Wherein, data processing equipment has the cancellation processing section, second information in being stored in data processing equipment is not to the effective electron device or effectively during the unique information of application software, and the cancellation processing section utilizes the unique first information of recording medium and is stored in second information in the data processing equipment and carries out cancellation.
A eleventh aspect of the present invention is a kind of record, reproduction and disposal system,
Wherein, record and transcriber have the cancellation processing section, when second information that stores is not to the effective electron device or effectively during the unique information of application software, the cancellation processing section utilizes the unique first information of recording medium and is stored in second information in the data processing equipment and carries out cancellation.
A twelveth aspect of the present invention is a kind of record, reproduction and disposal system, comprising:
Record and transcriber, this device is used to store only unique second information of distributing to effective electron device or effective application software, and be recorded in enciphered data on the recording medium in recording of encrypted data or reproduction on the recording medium at least, recording medium has its unique first information; And
Data processing equipment, this device utilize the key that produces according to second information and the unique first information of recording medium and enciphered data or to the enciphered data deciphering, wherein, second information storage in record and transcriber,
Wherein, data processing equipment is configured to second information that is stored in its storage area is sent to record and the transcriber with cancellation processing section, second information in being stored in record and transcriber is not that the cancellation processing section is carried out and cancelled to the effective electron device or effectively during the unique information of application software.
A thirteenth aspect of the present invention is a kind of record and transcriber, comprising:
In recording section and the reproducing part at least one, wherein, recording section is used for recording of encrypted data on recording medium, reproducing part is used for from the recording medium reproducing enciphered data, and record is used to cancel the first information of invalid electronic installation, the 3rd information that defines to the second unique information of each content, for each ciphering unit and the identification data unique to each pressing mold on recording medium;
Storage area, this part are used to store unique the 4th information of distributing to effective electron device or effective application software;
The cancellation processing section, this part judges according to the first information and the 4th information whether the 4th information of storage is to effective electron device or effective unique information of application software; And
Calculating section, determining the 4th information when the cancellation processing section is that calculating section obtains the intermediate key information unique to each recording medium according to the first information, the 4th information, second information and identification data to the effective electron device or effectively during the unique information of application software.
According to the present invention, in record and transcriber, store second information, as, unique device key of distributing to effective electron device or effective application software.Thereby, can not be from the external reader part key of record and transcriber.Be installed in the data that the interior application of data processing equipment does not need copyright protection technology.Thereby this software is stood the analysis of reverse-engineering.As a result, can guarantee the security of copyright protection technology.In addition, handle recording medium effectively in order to allow record and transcriber, because this device must have the secret information such as the device key of copyright protection technology; therefore; can prevent to produce that to pretend be clone's device of efficient apparatus, wherein, clone's device does not have valid license.
According to the present invention, in record and transcriber, implement a part of algorithm of copyright protection technology, as the calculating of medium unique key.As a result, be installed in a part of algorithm that the interior application program of data processing equipment only needs copyright protection technology, this application program is stood the analysis of reverse-engineering.Thereby, can guarantee the security of copyright protection technology.
Description of drawings
Fig. 1 is for describing the block diagram of the system that comprises register, player and dvd media that proposes.
Fig. 2 is for describing based on the dvd media record of PC and the block diagram of playback system.
Fig. 3 is for describing the synoptic diagram of the processing that is used for system shown in Figure 2 DVD driver 4 and main frame 5.
Fig. 4 is the process flow diagram of the verification operation of description system shown in Figure 2.
Fig. 5 is the block diagram based on the dvd media of PC record and playback system that illustrates according to first embodiment of the invention.
Fig. 6 is for describing the synoptic diagram be used for according to the processing of the DVD driver 4 of first embodiment of the invention and main frame 5.
Fig. 7 is the block diagram based on the dvd media of PC record and transcriber that illustrates according to second embodiment of the invention.
Fig. 8 is the block diagram based on the dvd media of PC record and playback system that illustrates according to third embodiment of the invention.
Fig. 9 is for describing the synoptic diagram be used for according to the processing of the DVD driver 4 of third embodiment of the invention and main frame 5.
Figure 10 is the block diagram based on the dvd media of PC record and playback system that illustrates according to fourth embodiment of the invention.
Figure 11 is the synoptic diagram of the processing of describing the DVD driver 4 be used for fourth embodiment of the invention and main frame 5.
Figure 12 is the block diagram based on the dvd media of PC record and playback system that illustrates according to fifth embodiment of the invention.
Figure 13 is the block diagram based on the dvd media of PC record and playback system that illustrates according to sixth embodiment of the invention.
Figure 14 is for describing the synoptic diagram be used for according to the processing of the DVD driver 4 of sixth embodiment of the invention and main frame 5.
Figure 15 is the block diagram based on the dvd media of PC record and playback system that illustrates according to seventh embodiment of the invention.
Figure 16 is for describing the synoptic diagram be used for according to the processing of the DVD driver 4 of seventh embodiment of the invention and main frame 5.
Figure 17 is the block diagram based on the writable media of PC record and playback system that illustrates according to eighth embodiment of the invention.
Figure 18 is the block diagram based on the ROM type media reproducing system of PC that illustrates according to ninth embodiment of the invention.
Embodiment
For the ease of understanding the present invention, at first, describe copyright protection technology, as be used for the CPRM framework of DVD in conjunction with Fig. 1.In Fig. 1, reference number 1 is for example represented based on the recordable DVD medium of CPRM standard such as DVD-R/RW or DVD-RAM.Reference number 2 is for example represented the register based on the CPRM standard.Reference number 3 is for example represented the player based on the CPRM standard.Each all is device or application software for register 2 and player 3.
Under the space state of dvd media 1, recording medium ID 11 in the zone that is called BCA (group's cutting area) or NBCA (narrow group cutting area) of the Lead-In Area of interior outer circumferential side of dvd media 1.In the embossing or pre-recorded data district of Lead-In Area, pre-recorded media key block (the following MKB that abbreviates as sometimes) 12.Media ID 11 is as coiling unique numeral for each medium.Media ID 11 is made up of media manufacturer code and sequence number.When media key is transformed to the unique medium unique key of each medium, need media ID 11.Media key block MKB is a group key, to obtain media key and to cancel device.Media ID and media key block are the first information unique to recording medium.
But dish 1 data can rewrite or posting field in, record is with the encrypted content of content key encryption.For encryption system, use C2 (cryptanalysis computing).
On dvd media 1, the title key 14 of recording of encrypted and CCI (copy control information) 15.Encrypted title keys 14 is the title key information of encrypting.Title key information is the key information that each title is increased.CCI is the copy control information, as no longer copying, copy once or freely copy etc.
Register 2 comprises structural detail, and they are device key 21, process MKB 22, C2G_23, randomizer 24, C2_E 25, C2_G 26 and C2_ECBC 27.Player 3 comprises structural detail, and they are device key 31, process MKB 32, C2_G 33, C2_D 35, C2_G 36 and C2_DCBC 37.
Device key 21 and 31 is to issue the reference numbers of each device wright or each application software manufacturer.Device key be by the permission person assign to effective electron device or the effective unique information of application software.Calculate by process MKB 22 from MKB 12 and device key 21 that dvd media 1 reproduces, to judge whether to cancel electronic installation or application software.The same with register 2, in player 3, whether MKB 12 and device key 31 are calculated by process MKB 32, be cancelled to judge player 3.
Process MKB 22 and 32 each all use MKB 12 and device key 21 and 31 calculation medium keys.When MKB 12 did not comprise the device key of register 2 or player 3 and result of calculation and predetermined value and is complementary as 0, register 2 or the player 3 of just determining to have this device key were invalid.In other words, register 2 or player 3 are cancelled.
Each is calculation medium key and media ID and the process that obtains medium unique key for C2_G 23 and C2_G 33.
Randomizer (RNG) 24 is used to produce title key.The title key that randomizer 24 produces is input among the C2_E 25.Title key is encrypted with medium unique key.Encrypted title keys 14 is recorded on the dvd media 1.
In player 3, encrypted title keys 14 and the medium unique key reproduced from dvd media 1 offer C2_D 35.Encrypted title keys is deciphered with medium unique key.As a result, obtain title key.
In register 2, CCI and title key offer C2_G 26.C2_G 26 obtains content key.Content key offers C2vECBC 27.C2_ECBC 27 usefulness content keys are to content-encrypt.Encrypted content 13 is recorded on the dvd media 1.
In player 3, CCI and title key offer C2_G 36.C2_G 36 obtains content key.Content key offers C2_DCBC 37.Decipher from the encrypted content 13 usefulness content keys that dvd media 1 reproduces.
In structure shown in Figure 1, the recording process that is used for register 2 is described.Register 2 reads MKB 12 from dvd media 1.Process MKB 22 calculating device keys 21 and MKB 12, and obtain media key.When result of calculation coupling predetermined value, just determine by MKB cancellation device key 21 (device of register 2 or application program).At this moment, register 2 stops active procedure, and forbids that content record is to dvd media 1.If the value of media key and predetermined value do not match, register 2 just continues active procedure.
Register 2 reads media ID 11 from dvd media 1, and media ID and media key are input to C2_G 23.C2_G 23 calculation medium ID and media keys, and obtain the medium unique key all unique to each medium.The title key that randomizer 24 produces is encrypted by C2_E 25.The title key of encrypting 14 is recorded on the dvd media 1.Calculate the title key and the CCI information of content by C2_G 26.As a result, C2_G 26 obtains content key.C2_ECBC 27 usefulness content keys are to content-encrypt.Encrypted content 13 and CCI 15 are recorded on the dvd media 1.
Below, the reproduction process of description player 3.At first, read MKB 12 from dvd media 1.Whether calculating device key 31 and MKB 12 are cancelled so that judge device key 31.When device key 31, when promptly the device of player 3 and application are not cancelled, just with the unique key of media ID calculation medium.Utilize encrypted title keys 14 and medium unique key to calculate title key.Title key and CCI 15 are input among the C2_G 36.As a result, obtain content key.Content key is input among the C2_DCBC 37.C2_DCBC 37 usefulness content keys calculate the encrypted content 13 that reproduces from dvd media 1.As a result, encrypted content 13 is decrypted.
In order to obtain the required content key of decryption content, each dvd media is needed unique media ID.Thereby even the encrypted content on the medium copies on another medium, because the media ID of other medium is different with the media ID of original medium, therefore, copied content can not be decrypted.As a result, can protect the copyright of content.
Structure shown in Figure 1 is record and transcriber.The present invention is applied under the PC environment dvd media 1 be carried out the situation of content protecting process.Below, the role who shares according to the PC and the driver of conventional system is described in conjunction with Fig. 2.In Fig. 2, reference number 4 is represented the DVD driver, as to from based on dvd media 1 record of aforementioned CPRM standard with reproduce the record and the transcriber of content.
Reference number 5 representatives are as the main frame of data processing equipment, for example PC.Main frame 5 is can handle to be recorded on the dvd media 1 and from the device or the application software of the content of its reproduction, and main frame 5 is connected to DVD driver 4.Main frame 5 for example by application software and the PC that application software wherein is installed form.
DVD driver 4 is connected with main frame 5 usefulness interface 4a.Interface 4a for example is ATAPI (additional packet interface), SCSI (small computer system interface), USB (USB (universal serial bus)), IEEE (Institute of Electrical and Electric Engineers) 1394 etc.
Pre-recorded media ID 11, media key block 12 and ACC (access control code) on dvd media 1.ACC is the data that are recorded on the dvd media 1.ACC makes DVD driver 4 and main frame 5 for the checkings mutually uniquely of each dvd media 1.
DVD driver 4 reads ACC 16 from dvd media 1.The ACC 16 that reads from dvd media 1 is input to the AKE (checking and key change) 41 of DVD driver 4.In addition, ACC 16 is sent to main frame 5.Main frame 5 is input to AKE 51 to the ACC that receives. AKE 41 and 51 exchange random number datas, and utilize the random number of exchange and the value of ACC to be created in the public session key (being called bus key) that changes in each verification operation.
Bus key offers MAC (Message Authentication Code) calculating unit 42 and 52. MAC calculating unit 42 and 52 is to utilize the media ID of the bus key calculation medium key block 12 that obtains and the process of MAC, and wherein, bus key is by AKE 41 and 51 parameters that obtain.Main frame 5 uses MAC computing block 42 and 52, whether has integrality so that determine MKB and media ID.
The rating unit 53 of main frame 5 is MAC 42 and 52 MAC that calculate relatively, and determine whether they mate.When the value of MAC is mated, confirm that MKB and media ID have integrality.According to relatively exporting and gauge tap SW1.
Switch SW 1 on/off the encryption of record path or the reproduction paths and the main frame 5 of the dvd media 1 of DVD driver 4/(or) signal path between the deciphering module 54.The on/off of switch SW 1 expression signal path.In fact, switch SW 1 expression: when the connection signal path, continue the processing of main frame 5, and when the cut-off signal path, stop the processing of main frame 5.Encrypting-decrypting module 54 is following calculating units, and these parts calculate content key with medium unique key, encrypted title keys and CCI, use the content key encryption content, obtains encrypted content 13, perhaps with content key encrypted content 13 is deciphered.
Medium unique key calculating unit 55 is following calculating units, these parts MKB 12, media ID and the unique key of device key 56 calculation medium.Identical with register shown in Fig. 1 or player, medium unique key calculating unit 55 usefulness device key and MKB 12 calculation medium keys.Medium unique key calculating unit 55 usefulness media keys and the unique key of media ID 11 calculation medium.When media key is predetermined value, determine that electronic installation or application software are invalid.As a result, electronic installation or application software are cancelled.Thereby medium unique key calculating unit 55 is also as the cancellation processing section of cancelling electronic installation or application software.
When recorded content, if the result of rating unit 53 has the integrality of affirmation, switch SW 1 is just connected.At this moment, provide encrypted content 13, encrypted title keys 14 and CCI 15 by switch SW 1 to DVD driver 4 from encrypting-decrypting module 54.As a result, encrypted content 13, encrypted title keys 14 and CCI 15 record on the dvd media 1.When reproducing content, if the result of rating unit 53 has the integrality of affirmation, switch SW 1 is just connected.At this moment, encrypted content 13, encrypted title keys 14 and the CCI 15 that reproduces from dvd media 1 offers encrypting-decrypting module 54 by switch SW 1.54 pairs of encrypted contents of encrypting-decrypting module are decrypted.
Fig. 3 is illustrated under the conventional PC environment shown in Figure 2 in the system that uses dvd media the treatment step of switching signal in dvd media 1, DVD driver 4 and main frame 5.Main frame 5 sends order to DVD driver 4.DVD driver 4 is according to order and executable operations.
Be the order of response, seek and read the ACC (step S1) of dvd media 1 from main frame 5 receptions.In next step S2, ACC is input among the AKE 41.In addition, ACC is sent to main frame 5.In main frame 5, the ACC that receives is input among the AKE 51.AKE 41 and 51 exchange random number datas.The random number of AKE 41 and the exchange of 51 usefulness and the value of ACC 16 produce bus key, as the session key that changes in each dialogue.Bus key is shared by DVD driver 4 and main frame 5.When mutual checking was unsuccessful, process stopped.
When no matter when opening or closing power supply or change dish, all carry out verification operation.When carrying out the reproduction operation, can carry out verification operation with the operation of record button executive logging or with broadcast button.For example, when pressing record button or broadcast button, carry out verification operation.
When being proved to be successful, in step S3, main frame 5 request DVD drivers 4 read MKB (media key block) packet #0 from dvd media 1.The duplicate record 12 times in Lead-In Area of the MKB packet 0-packet 15 of 16 sectors.With a packet is that unit carries out the error correcting code cataloged procedure.
In step S4, DVD driver 4 reads MKB packet #0.In step S5, read data packet #0.DVD driver 4 returns the MKB (step S6) of modification to main frame 5.When DVD driver 4 was read MKB, DVD driver 4 usefulness bus key were calculated the MAC value as parameter, increased the MAC value on MKB, and the data that obtain are sent to main frame 5.In step S7 and S8,, that is, for example, repeat solicit operation, read operation and transfer operation at read data packet #15 and before being sent to main frame 5 to all the other the MKB packets except packet #0.
Main frame 5 is to DVD driver 4 request media ID.DVD driver 4 reads media ID from dvd media 1.In step S11, read media ID.When DVD driver 4 when dvd media 1 reads media ID, DVD driver 4 usefulness bus key are calculated the MAC value as parameter.In step S12, DVD driver 4 increases MAC value m1 on media ID, and the data that obtain are sent to main frame 5.
Main frame 5 usefulness are calculated the MAC value from the parameter of the MKB 12 of DVD driver 4 receptions with from the bus key that media ID 11 receives.The MAC value that the MAC value that rating unit 53 usefulness receive from DVD driver 4 is relatively calculated.When they mated, main frame 5 determined that the MKB and the media ID that receive are effectively, and connects switch SW 1, so that process is carried out.On the contrary, when they did not match, main frame 5 determined that the MKB and the media ID that receive are cancelled, and cut-off switch SW1, so that process is stopped.
In step S13, main frame 5 is to DVD driver 4 request encrypted contents.In step S14, DVD driver 4 is from dvd media 1 reading encrypted content.In step S13, encrypted content is sent to main frame 5.The medium unique key calculating unit 55 usefulness device key 56 of main frame 5, MKB 12 and the unique key of media ID 11 calculation medium.Medium unique key offers encrypting-decrypting module 54.Encrypting-decrypting module 54 usefulness encrypted title keys 14 and CCI 15 obtain content key.Encrypting-decrypting module 54 usefulness content keys are decrypted the encrypted content that reads from dvd media 1.54 pairs of contents that record on the dvd media 1 of encrypting-decrypting module are encrypted.
In the step ST1 of process flow diagram shown in Figure 4, the MAC calculated value that MAC calculated value that MAC calculating unit 42 usefulness bus key obtain as parameter and rating unit 53 usefulness bus key obtain as parameter compares.When they mate, in step ST2, connect switch SW 1.When they do not match, in step ST3, cut-off switch SW1, and process stops.
Fig. 5 illustrates the first embodiment of the invention that is applied to PC environment shown in Figure 2.According to first embodiment, the device key of secret information on storing on DVD driver 4 one sides as main frame 5 one sides.As mentioned above, device key is the information that is used to carry out the cancellation operation and obtains media key.
In Fig. 5, reference number 46 is the device key that are stored on DVD driver 4 one sides.To main frame 5 sending device keys 46, device key 46 is input to encryption section for safely, as DES (data encryption standards) encryption equipment 47.Des encryption device 47 usefulness bus key are encrypted device key 46.The device key of encrypting is sent to main frame 5 by driver-host interface 4a.
Encrypt device key and be input to DES decipher 57, have only when two MAC value couplings in rating unit 53, when promptly confirming integrality, just connect switch SW 2 by switch SW 2.In Fig. 5, the on/off in switch SW 2 representation signal paths.In fact, identical with switch SW 1, switch SW 2 expressions: when connecting switch SW 2, the process of main frame 5 is proceeded, and when cut-off switch SW2, the process of main frame 5 stops.Bus key offers DES decipher 57.57 pairs of device key deciphering of DES decipher.
The device key of deciphering offers medium unique key calculating unit 55.Medium unique key calculating unit 55 usefulness MKB 12, media ID and the unique key of device key 46 calculation medium.Medium unique key calculating unit 55 usefulness MKB 12 and device key 46 calculation medium keys.Medium unique key calculating unit 55 usefulness media ID and the unique key of media key calculation medium.When the media key of medium unique key calculating unit 55 calculating was predetermined value, device key was that DVD driver 4 is cancelled, and the process of DVD driver 4 stops.Medium unique key calculating unit 55 has the function of cancellation processing section.
Medium unique key offers encrypting-decrypting module 54.Encrypting-decrypting module 54 usefulness encrypted title keys 14 and CCI 15 obtain content key.Encrypting-decrypting module 54 usefulness content keys are decrypted the encrypted content that reads from dvd media 1.54 pairs of contents that are recorded on the dvd media 1 of encrypting-decrypting module are encrypted.
Fig. 6 illustrates the treatment step according to first embodiment.Since from seek with the process that reads ACC (step S21) to the process (step S32) of returning media ID and m1 with shown in Figure 3 identical, therefore, their process is simply description only.In step S21, seek and read ACC.In step S22, when being proved to be successful, produce bus key, bus key is the session key that changes when each checking.
In step S23, main frame 5 request DVD drivers 4 read MKB (media key block) packet #0.In step S24, DVD driver 4 reads MKB packet #0.In step S25, read data packet #0.When DVD driver 4 read MKB, in step S26, DVD driver 4 usefulness bus key were calculated the MAC value as parameter, and returned the data (revising MKB) that increase the MAC value on MKB to main frame 5.In step S27 and S28, all the other the MKB packets except that packet #0 are carried out solicit operation, read operation and transfer operation.
Main frame 5 is to DVD driver 4 request media ID (step S29).DVD driver 4 reads media ID (step S30).In step S31, read media ID.When DVD driver 4 read media ID, DVD driver 4 usefulness bus key were calculated the MAC value as parameter.In step S32, DVD driver 4 increases MAC value m1 on media ID, and the data that obtain are sent to main frame 5.
Main frame 5 usefulness are also calculated the MAC value with bus key as parameter once more from MKB 12 and media ID 11 that DVD driver 4 receives.When the MAC value of calculating was complementary with the MAC value that receives from DVD driver 4, main frame 5 determined that the MKB and the media ID that receive are effective, and connects switch SW 1, so that process is carried out forward.On the contrary, when they did not match, main frame 5 just determined that the MKB and the media ID that receive are altered, and cut-off switch SW1, so that process stops.
In step S33, main frame 5 is to DVD driver 4 request device key.DVD driver 4 is encrypted 47 pairs of device key of des encryption device 46, and sends to main frame 5 (step S34) encrypting device key.Main frame 5 makes DES decipher 57 usefulness bus key decipher device key.
In step S35, main frame 5 is to DVD driver 4 request encrypted contents.In step S36, DVD driver 4 reading encrypted contents.In step S35, DVD driver 4 sends encrypted content to main frame 5.The medium unique key calculating unit 55 usefulness device key 46 of main frame 5, MKB 12 and the unique key of media ID 11 calculation medium.Medium unique key offers encrypting-decrypting module 54.54 pairs of encrypted contents of encrypting-decrypting module are decrypted.54 pairs of contents that record on the dvd media 1 of encrypting-decrypting module are encrypted.
According to aforementioned first embodiment, in DVD driver 4, implement device key, this device key is the secret information of copyright protection technology.For example, implement device key at LSI (large scale integrated circuit) in as flash memory.Thereby, can not read the device key the LSI from the outside of DVD driver 4.As a result, be installed in the secret information that application software in the main frame 5 needn't have copyright protection technology.Thereby, because this software is stood the analysis of carrying out with reverse-engineering, therefore, can guarantee the security of copyright protection technology.
In order to allow driver to handle dvd media 1 effectively, the secret information of driver requests copyright protection technology.Thereby, for the effect of present embodiment, can prevent to produce that to pretend be clone's driver of effective driver, wherein, clone's driver does not have valid license.
Fig. 7 illustrates the second embodiment of the invention that is applied to the PC environment.According to second embodiment, be divided into two unit as the device key of secret information on main frame 5 one sides, one of them unit is stored on DVD driver 4 one sides.
In Fig. 7, reference number 46a representative is stored in the first half parts of device key on DVD driver 4 one sides.The first half parts of device key are the parts of device key, and when the first half parts of device key combined with the second half parts, described part became complete device key.The first half part 46a of device key are input to encryption section such as des encryption device 47.Des encryption device 47 usefulness bus key are encrypted the first half part 46a.The first half parts of encrypting device key are sent to main frame 5 by driver-host interface 4a.
The first half parts of encrypting device key are input to DES decipher 57 by switch SW 2, have only when rating unit 53 detects the coupling of MAC value, just connect switch SW 2.Bus key offers DES decipher 57.The first half parts of 57 pairs of device key of DES decipher are decrypted.
Reference number 56a represents the second half parts of device key.The first half part 46a of DES decipher 57 deciphering and the second half part 56a are input to device key bound fraction 58.When the first half part 46a and the second half part 56a by device key bound fraction 58 in conjunction with the time, obtain device key.
The device key that obtains offers medium unique key calculating unit 55.Medium unique key calculating unit 55 usefulness MKB 12, media ID and the unique key of device key 46 calculation medium.Medium unique key offers encrypting-decrypting module 54.Encrypting-decrypting module 54 usefulness encrypted title keys 14 and CCI 15 obtain content key.Encrypting-decrypting module 54 usefulness content keys are decrypted the encrypted content that reads from dvd media 1.54 pairs of contents that are recorded on the dvd media 1 of encrypting-decrypting module are encrypted.
Except device key was divided into two unit, second embodiment was identical with first embodiment.Thereby the process of second embodiment is with identical shown in Fig. 6.Omission is to the explanation of the process of second embodiment.
According to second embodiment,, in driver 4, implement the part of device key for the data of copyright protection technology.For example, in LSI, implement the part of device key.As a result, be installed in a part of data that application program in the main frame 5 only needs copyright protection technology.Therefore, this software is stood the analysis of carrying out with reverse-engineering.Thereby, can guarantee the security of copyright protection technology.
In order to allow driver to handle dvd media 1 effectively, driver must have the secret information of copyright protection technology, as device key.Thereby, for the effect of present embodiment, can prevent to produce that to pretend be clone's driver of effective driver, wherein, clone's driver does not have valid license.Have only as the first half part 46a of device key and the second half part 56a all effectively the time, just definite electronic installation or application software are effective.Thereby, can carry out the cancellation process to DVD driver 4 and main frame 5.
Fig. 8 illustrates the third embodiment of the present invention.According to the 3rd embodiment, DVD driver 4 has device key 46.DVD driver 4 has the medium unique key calculating unit with reference number 48 representatives.
According to the 3rd embodiment, because DVD driver 4 has medium unique key calculating unit 48, therefore, DVD driver 4 needn't transmit MKB and the media ID of reproducing from dvd media 1 to main frame 5.As a result, omit MAC calculating unit, rating unit and switch, wherein, the MAC value that rating unit relatively calculates, described switch is according to relatively exporting and Be Controlled.In addition, do not need main frame 5, only just can carry out the cancellation process with dvd media 1 and DVD driver 4.
The medium unique key calculating unit 48 usefulness MKB 12 of DVD driver 4, media ID and the unique key of device key 46 calculation medium.Medium unique key calculating unit 48 usefulness MKB12 and device key 46 calculation medium keys.In addition, medium unique key calculating unit 48 usefulness media ID 11 and the unique key of media key calculation medium.For to the main frame 5 unique key of transmission medium safely, medium unique key offers des encryption device 49.Des encryption device 49 usefulness bus key are encrypted medium unique key.The medium unique key of encrypting offers the DES decipher 59 of main frame 5.DES decipher 59 usefulness bus key are to encrypting the medium unique key deciphering.
The medium unique key of deciphering offers encrypting-decrypting module 54.Encrypting-decrypting module 54 usefulness encrypted title keys 14 and CCI 15 obtain content key.Encrypting-decrypting module 54 usefulness content keys are decrypted the encrypted content that reads from dvd media 1.In addition, 54 pairs of contents that are recorded on the dvd media 1 of encrypting-decrypting module are encrypted.
Fig. 9 illustrates the treatment step according to the 3rd embodiment.Seek with the step that reads ACC (step S41) to the step that reads all the other MKB packets (step S48) with shown in Figure 3 identical.Thereby these steps are only simple to be described.
In step S42, carry out checking.When being proved to be successful, produce bus key, bus key is the session key that changes in each verification operation.In step S43, main frame 5 request DVD drivers 4 read MKB (media key block) packet #0.In step S44, DVD driver 4 reads MKB packet #0.In step S45, read data packet #0.When DVD driver 4 read MKB, in step S46, DVD driver 4 usefulness bus key were calculated the MAC value as parameter, and were transmitted in the data that MKB goes up increases the MAC value to main frame 5.In step S47 and S48, all the other the MKB packets except that packet #0 are carried out solicit operation, read operation and transfer operation.
In step S49, main frame 5 is to the medium unique key of DVD driver 4 requests in step S49.DVD driver 4 sends the medium unique key (step S50) of encrypting to main frame 5.Medium unique key offers encrypting-decrypting module 54.When main frame 5 in step S51 during to DVD driver 4 request encrypted contents, DVD driver 4 reading encrypted contents (step S52).54 pairs of encrypted contents of encrypting-decrypting module are decrypted.54 pairs of contents that record on the dvd media 1 of encrypting-decrypting module are encrypted.
Figure 10 illustrates the fourth embodiment of the present invention.Identical with the 3rd embodiment, a fourth embodiment in accordance with the invention, DVD driver 4 has medium unique key calculating unit 48.Main frame 5 has device key 56.Device key 56 is sent to DVD driver 4 from main frame 5 safely.
According to the 4th embodiment, because DVD driver 4 has medium unique key calculating unit 48, therefore, DVD driver 4 needn't transmit MKB and the media ID of reproducing from dvd media 1 to main frame 5.As a result, omit MAC calculating unit, rating unit and switch, wherein, the MAC value that rating unit relatively calculates, described switch is according to relatively exporting and Be Controlled.
The device key 56 of main frame 5 offers des encryption device 59b.Des encryption device 59b encrypts device key 56 with bus key.Encrypt the DES decipher 49b that device key is sent to DVD driver 4.4 pairs of device key deciphering of DVD driver.The deciphering device key is input to medium unique key calculating unit 48.
The medium unique key calculating unit 48 usefulness MKB 12 of DVD driver 4, media ID and the unique key of device key 46 calculation medium.In other words, medium unique key calculating unit 48 usefulness MKB 12 and device key 46 calculation medium keys.Medium unique key calculating unit 48 usefulness media ID 11 and the unique key of media key calculation medium.Medium unique key offers des encryption device 49a.Des encryption device 49a encrypts medium unique key with bus key.The medium unique key of encrypting offers the DES decipher 59a of main frame 5.DES decipher 59a deciphers encrypting medium unique key with bus key.
The medium unique key of deciphering offers encrypting-decrypting module 54.Encrypting-decrypting module 54 usefulness encrypted title keys 14 and CCI 15 obtain content key.Encrypting-decrypting module 54 usefulness content keys are decrypted the encrypted content that reads from dvd media 1.54 pairs of contents that are recorded on the dvd media 1 of encrypting-decrypting module are encrypted.
Figure 11 illustrates the treatment step according to the 4th embodiment.Seek with the step that reads ACC (step S61) to the step that reads all the other MKB (step S68) with shown in Figure 3 identical, thereby these steps are simply description only.
In step S62, carry out checking.When being proved to be successful, produce bus key, bus key is the session key that changes in each verification operation.Subsequently, in step S63, main frame 5 request DVD drivers 4 read MKB (media key block) packet #0.In step S64, DVD driver 4 reads MKB packet #0.In step S65, read data packet #0.When DVD driver 4 read MKB, DVD driver 4 usefulness bus key were calculated the MAC value as parameter, and were transmitted in the data that MKB goes up increases the MAC value to main frame 5.In step S67 and S68, all the other the MKB packets except that packet #0 are carried out solicit operation, read operation and transfer operation.
In step S69, main frame 5 sends the device key of encrypting to DVD driver 4.The unique key of DVD driver 4 calculation medium.In step S70, main frame 5 request medium unique key.DVD driver 4 sends the medium unique key (step S71) of encrypting to main frame 5.Medium unique key offers encrypting-decrypting module 54.When main frame 5 in step S72 during to DVD driver 4 request encrypted contents, DVD driver 4 reading encrypted contents (step S73).54 pairs of encrypted contents of encrypting-decrypting module are decrypted.54 pairs of contents that record on the dvd media 1 of encrypting-decrypting module are encrypted.
According to third and fourth embodiment of front, in driver 4, implement the part of copyright protection technology algorithm, as be used for the calculating section of medium unique key.For example, in LSI, implement medium unique key calculating unit 48.Be installed in a part of algorithm that application in the main frame 5 only needs copyright protection technology.Therefore, this software is stood the analysis of carrying out with reverse-engineering.Thereby, can guarantee the security of copyright protection technology.
According to the 3rd embodiment, handle dvd media 1 effectively in order to allow driver, driver must have the secret information of copyright protection technology, as device key.As a result, can prevent to produce that to pretend be clone's driver of effective driver, wherein, clone's driver does not have valid license.
Figure 12 illustrates the fifth embodiment of the present invention.According to first to fourth embodiment of front, the present invention is applied to CPRM, and CPRM is the copyright protection technology that is used for DVD.On the contrary, the 5th embodiment has the expanded structure of CPRM framework shown in Figure 2.
According to the 5th embodiment, according to parameter A 62 and the medium unique key calculating unit 61 of operating host 5.On the contrary, operate encrypting-decrypting module 63 according to B parameter 64.Parameter A 62 and fixed value or the data of B parameter 64 for reading from dvd media 1.
In conventional CPR M, with MKB and device key calculation medium key.With media key and the unique key of media ID calculation medium.In the system that CPRM is expanded, carry out these calculating according to parameter A 62.Encrypting-decrypting module 63 calculates content key according to B parameter 64.Identical according to the process of the 5th embodiment and conventional CPR M.Thereby, omit explanation according to the process of the 5th embodiment.
Figure 13 illustrates the sixth embodiment of the present invention.The 6th embodiment has the expanded structure of conventional CPR M framework.DVD driver 4 has device key 46, parameter A 62 and B parameter 64.For to main frame 5 carrying device key 46, parameter A 62 and B parameter 64 safely, des encryption device 65 usefulness bus key are to these information encryptions.
Enciphered data is input to DES decipher 66 by switch SW 3, when rating unit 53 has detected the coupling of MAC value, when promptly having confirmed integrality, connects switch SW 3.Bus key offers DES decipher 66.66 pairs of device key of DES decipher, parameter A 62 and B parameter 64 are decrypted.The device key and the parameter A of deciphering offer medium unique key calculating unit 61.Medium unique key calculating unit 61 usefulness MKB 12, media ID, device key 46 and the unique key of parameter A calculation medium.
Medium unique key and B parameter offer encrypting-decrypting module 63.These data of encrypting-decrypting module 63 usefulness obtain content key.Encrypting-decrypting module 63 usefulness content keys carry out encrypt/decrypt to content.
Figure 14 illustrates the treatment step according to the 6th embodiment.Seek and the step that reads ACC (step S81) identical to the step (step S92) of returning media ID and m1 and conventional CPR M.Thereby these steps are only simple to be described.In step S81, seek and read ACC.In step S82, when being proved to be successful, produce bus key, bus key is the session key that changes when each checking.
In step S83, main frame 5 request DVD drivers 4 read MKB (media key block) packet #0.In step S84, DVD driver 4 reads MKB packet #0.In step S85, read data packet #0.When DVD driver 4 read MKB, in step S86, DVD driver 4 usefulness bus key were calculated the MAC value as parameter, and returned the data (revising MKB) that increase the MAC value on MKB to main frame 5.In step S87 and S88, all the other the MKB packets except that packet #0 are carried out solicit operation, read operation and transfer operation.
Main frame 5 is to DVD driver 4 request media ID (step S89).DVD driver 4 reads media ID (step S90).In step S91, read media ID.When DVD driver 4 read media ID, DVD driver 4 usefulness bus key were calculated the MAC value as parameter.In step S92, DVD driver 4 increases MAC value m1 on media ID, and the data that obtain are sent to main frame 5.
Main frame 5 usefulness are also calculated the MAC value with bus key as parameter once more from MKB 12 and media ID 11 that DVD driver 4 receives.When the MAC value of calculating was complementary with the MAC value that receives, main frame 5 determined that the MKB and the media ID that receive are effective, and connects switch SW 1 and SW3, so that process is carried out forward.On the contrary, when they did not match, main frame 5 just determined that the MKB and the media ID that receive are altered, and cut-off switch SW1 and SW3, so that process stops.
In step S93, main frame 5 is to DVD driver 4 request device key, parameter A and B parameter.65 pairs of device key 46 of the des encryption device of DVD driver 4, parameter A and B parameter are encrypted, and ciphered data is sent to main frame 5 (step S94).The DES decipher 66 usefulness bus key of main frame 5 are deciphered device key.
In step S95, main frame 5 is to DVD driver 4 request encrypted contents.In step S96, DVD driver 4 reading encrypted contents.In step S95, encrypted content sends main frame 5 to.Medium unique key calculating unit 61 usefulness device key 46, MKB 12, media ID 11 and the unique key of parameter A calculation medium of main frame 5.Medium unique key offers encrypting-decrypting module 63.63 pairs of encrypted contents of encrypting-decrypting module are decrypted.63 pairs of contents that record on the dvd media 1 of encrypting-decrypting module are encrypted.
Figure 15 illustrates the seventh embodiment of the present invention.According to the 7th embodiment, DVD driver 4 has medium unique key calculating unit 67.Main frame 5 has device key 56, parameter A 62 and B parameter 64.Device key 56 and parameter A 62 are sent to DVD driver 4 from main frame 5 safely.
According to the 7th embodiment, because DVD driver 4 has medium unique key calculating unit 67, therefore, DVD driver 4 needn't send MKB and the media ID reproduced from dvd media 1 to main frame 5.As a result, omit MAC calculating unit, rating unit and switch, wherein, the MAC value that rating unit relatively calculates, described switch is according to comparative result and Be Controlled.
The device key 56 and the parameter A 62 of main frame 5 offer des encryption device 68.Des encryption device 68 usefulness bus key are encrypted device key 56 and parameter A 62.Enciphered data sends the DES decipher 69 of DVD driver 4 to.69 pairs of device key of DES decipher and parameter A deciphering.The device key and the parameter A of deciphering are input to medium unique key calculating unit 67.
Medium unique key calculating unit 67 usefulness MKB 12, media ID, device key 46 and the unique key of parameter A calculation medium of DVD driver 4.Medium unique key offers des encryption device 70.Des encryption device 70 usefulness bus key are encrypted medium unique key.The medium unique key of encrypting offers the DES decipher 71 of main frame 5.DES decipher 71 usefulness bus key are decrypted encrypting medium unique key.
The medium unique key of deciphering offers encrypting-decrypting module 63.Encrypting-decrypting module 63 usefulness encrypted title keys 14, CCI 15 and parameter A obtain content key.Encrypting-decrypting module 63 usefulness content keys are decrypted the encrypted content that reads from dvd media 1.63 pairs of contents that are recorded on the dvd media 1 of encrypting-decrypting module are encrypted.
Figure 16 illustrates the treatment step according to the 7th embodiment.Seek identical to the step that reads all the other MKB packets (step S108) with the step that conventional CPR M handles with the step that reads ACC (step S101).Thereby these steps are only simple to be described.
In step S102, carry out checking.When being proved to be successful, produce bus key, bus key is the session key that changes in each verification operation.In step S103, main frame 5 request DVD drivers 4 read MKB (media key block) packet #0.In step S104, DVD driver 4 reads MKB packet #0.In step S105, read data packet #0.When DVD driver 4 read MKB, in step S106, DVD driver 4 usefulness bus key were calculated the MAC value as parameter, and were transmitted in the data that MKB goes up increases the MAC value to main frame 5.In step S107 and S108, all the other the MKB packets except that packet #0 are carried out solicit operation, read operation and transfer operation.
In step S109, main frame 5 sends device key and the encryption parameter of encrypting to DVD driver 4.In step S110, main frame 5 is to DVD driver 4 request medium unique key.The unique key of DVD driver 4 calculation medium.In step S111, DVD driver 4 sends the medium unique key of encrypting to main frame 5.Medium unique key offers encrypting-decrypting module 63.When main frame 5 in step S112 during to DVD driver 4 request encrypted contents, DVD driver 4 reading encrypted contents (step S113).63 pairs of encrypted contents of encrypting-decrypting module are decrypted.63 pairs of contents that record on the dvd media 1 of encrypting-decrypting module are encrypted.
Below, describe according to the eighth embodiment of the present invention in conjunction with Figure 17.Identical with the 3rd embodiment (referring to Fig. 8) of front, according to the 8th embodiment, produce medium unique key by driver.In addition, identical with the 5th embodiment (referring to Figure 12), the 6th embodiment (referring to Figure 13) with the 7th embodiment (referring to Figure 15), produce content key according to B parameter (expanding the CPRM system).
In the CPRM expanding system, operation parameter A and B are so that the unique key of calculation medium and carry out encryption/decryption.These parameters can be stored on main frame one side or driver one side.Replacedly, parameter can be recorded on the medium and by main frame and read.When parameter A and B exchanged by interface, they should be encrypted, so that transmit them safely.
In Figure 17, reference number 101 is represented recordable media.On medium 101, write down EKB111, encryption disc key Em (Kd) 112, encrypted content 113, dish ID 114 and unit key generation value Vu 115.Identical with first to the 7th embodiment of front, concrete identical with the 3rd embodiment, write down CCI relatively with encrypted content 113.
The term of key information shown in Figure 17 is described below.
EKB 111 is key packet, and utilizing it is each device key distribution media key K m.EKB 111 is corresponding with the media key block MKB of each embodiment of front.
Media key Km is to each medium unique key information.When EKB did not comprise media key, its expression device key was cancelled.
Dish key K d is to be unique key information to each content at least.Dish key K d can be unique to the content of every master.Encryption disc key Em (Kd) the 112nd, the encryption key that dish key K d encrypts with media key Km.Encryption disc key Em (Kd) 112 is recorded on the medium 101.Encryption disc key Em (Kd) 112 is used to produce the embedded key Ke unique to each medium.Encryption disc key Em (Kd) 112 is corresponding with the parameter A (being used for producing medium unique key at driver 4) among the 5th to the 7th embodiment.
Unit key generation value Vu 115 is the parameters for each ciphering unit definition.Each ciphering unit is made up of a plurality of sectors.Unit key generation value Vu 115 is used for generation unit key K u, and main frame 105 utilizes unit key Ku that encrypted content 113 is decrypted.Unit key generation value Vu 115 is corresponding with the B parameter (being used for the encrypted content 113 of main frame 5 is carried out encrypt/decrypt) among the 5th to the 7th embodiment.
Dish ID 114 is IDs unique to each pressing mold.ID 114 is corresponding with the media ID of the 3rd embodiment for dish.
Embedded key Ke is to each medium unique key information.Embedded key Ke is corresponding with the medium unique key of the 3rd embodiment.
Obtain media key Km by the device key 146 of driver 104 and the EKB 111 of medium 101.With the media key Km of medium 101 and encryption disc key Em (Kd) 112 and acquisition dish key K d.Obtain embedded key Ke with dish key K d and dish ID 114
Unit key Ku is used for key that encrypted content 113 is encrypted or deciphered.Unit key Ku obtains by embedded key Ke and unit key generation value Vu.Unit key Ku is corresponding with the content key of each embodiment of front.
The operation of the 8th embodiment is described below in conjunction with treatment scheme.
At first, AKE 141 and 151 verifies mutually.When they be proved to be successful, produce bus key.The parameter (among Figure 17 not shown) relevant with checking offers at least one in AKE 141 and 151.
Driver 104 reads EKB from medium 101, and EKB is offered driver 104.The process EKB 122 of driver 104 calculates EKB and the device key 146 that receives from medium 101, and obtains media key Km.When result of calculation for example is 0, the cancellation device key.The device key 146 of driver 104 is keys of unique each driver model of distribution.
Driver 104 is from medium 101 reading encrypted device key Em (Kd).AES_D 123 usefulness media key Km are decrypted encrypting device key Em (Kd), and acquisition dish key K d.AES (Advanced Encryption Standard) is the encryption method that U.S. government adopts, and it is as DES succession's new encryption standard.
In addition, driver 104 reads dish ID 115 from medium 101.AES_G 148 calculating dial ID and dish key K d, and obtain embedded key Ke.
After driver 104 and main frame 105 mutual checkings and obtaining bus key, main frame 105 request drivers 104 transmit embedded key Ke.
When driver 104 was sent to main frame 105 to Ke by interface 104a, AES encryption equipment 149 usefulness bus key were encrypted Ke.The Ke of 159 pairs of encryptions of AES decipher of main frame 105 is decrypted and obtains Ke.AES encryption equipment 148 and AES decipher 149 are carried out the process that is used for CBC (CBC) pattern.
Main frame 105 contents processing in ciphering unit.The unit key generation value Vu 115 of main frame 105 from driver 104 reading encrypted unit.AES_G 158 usefulness embedded key Ke and unit key generation value Vu computing unit key K u.
Main frame 105 is the ciphering unit of unit reading encrypted content 113 with the sector data.Driver 104 transmits the sector data that has read to main frame 105.The unit key Ku of the encrypting-decrypting module 154 usefulness ciphering units of main frame 105 is decrypted sector data.
Below, in conjunction with Figure 18 the ninth embodiment of the present invention is described.According to the 9th embodiment, reproduce content as the ROM dish from ROM type media 110.
Pre-recorded content on ROM type media 110.Main frame 105 needn't perform encryption processing.Main frame 105 has deciphering module 160.Decipher by deciphering module 160 from the encrypted content that medium 110 reads.Deciphering module 160 obtains the AV content.
ROM type media 110 has media key Km and dish key K d, and wherein, dish key K d is to each content unique key information.Each content is made up of one or more ciphering units.
Embedded key generation value Ve is recorded on the medium 110.Embedded key generation value Ve is the nonzero value of each pressing mold (pressing mold is an original disc, wherein, first pressing mold that photoresist is developed or produces from original disc) record in dish factory.By another way at disc recording embedded key generation value Ve, as physical watermarks.
Embedded key Ke is corresponding with the medium unique key of the 3rd embodiment.Embedded key generation value Ve is a kind of media ID, utilizes embedded key generation value Ve to produce embedded key Ke.
According to the 9th embodiment, carry out the process identical with the 8th embodiment.At first, AKE 141 and 151 verifies mutually.As a result, produce bus key.The process EKB 122 of driver 104 calculates EKB and the device key 146 that reads.As a result, EKB 122 obtains media key Km, and carries out the cancellation process.123 pairs of media key Km deciphering of AES_D, and acquisition dish key K d.AES_G 148 obtains embedded key Ke.
AES encryption equipment 149 usefulness bus key are encrypted Ke.The Ke of 159 pairs of encryptions of AES decipher of main frame 105 is decrypted and obtains Ke.
Main frame 105 is from the unit key generation value Vu 115 of driver 104 reading encrypted unit.AES_G 158 computing unit key K u.
The unit key Ku of the deciphering module 160 usefulness ciphering units of main frame 105 is decrypted the sector data of the ciphering unit that main frame 105 is asked.
According to the present invention; because implement electronic installation or the unique information of application software in record and transcriber, wherein, this information is the secret information of copyright protection technology; therefore, be installed in the secret information that wherein application software needn't have copyright protection technology.Thereby this software is stood the analysis of carrying out with reverse-engineering.As a result, can guarantee the security of copyright protection technology.
Device key is to electronic installation or the unique information of application software, and device key is divided into by record and transcriber and the shared two parts of data processing equipment.Thereby record and transcriber and application software all can be cancelled.
According to the present invention, in record and transcriber, implement a part of algorithm of copyright protection technology, as be used for the calculating section of medium unique key.Thereby the application software of data processing equipment only needs a part of algorithm.As a result, this software is stood the analysis of carrying out with reverse-engineering.Thereby, can guarantee the security of copyright protection technology.
Although the present invention represents with its optimal mode embodiment and describes, but those skilled in the art should be appreciated that, as long as without departing from the spirit and scope of the present invention, can aspect form of the present invention and details, carry out aforementioned and various other change, abreviation and increases.For example, device key can be divided into two parts.Driver and main frame can be shared the part of division.Replacedly, driver can have the medium unique key calculating unit.
When by interface and exchange encrypt content, encrypted content can be encrypted, so that transmit it safely.Although the parameter relevant with checking offers AKE, also can provide a description invalidated object or the effectively tabulation of object to AKE.
Commercial Application
CPRM and the expansion that illustrates as copyright protection technology described in the front CPRM. Yet the present invention can be applicable to except as the CPRM of copyright protection technology Situation. Although the present invention is applied to the system based on PC, be noted that not office of the present invention Be limited to the structure that PC is combined with driver. For example, the present invention can be applicable to portable motion or The still image camera arrangement, this system comprises the CD as medium, the driving of drive medium The microcomputer of device and control driver.

Claims (21)

1. one kind is write down and transcriber, comprising:
In recording section and the reproducing part at least one, wherein, recording section is used for recording of encrypted data on recording medium, and reproducing part is used to reproduce the enciphered data that is recorded on the recording medium, and recording medium has its unique first information;
Storage area, this part are used to store unique second information of distributing to effective electron device or effective application software; And
The key that the coupling part that is used for mutual verification msg treating apparatus, data processing equipment utilization produce according to the unique first information of recording medium and second information in the storage area that is stored in and enciphered data or enciphered data deciphered at least.
2. record as claimed in claim 1 and transcriber,
Wherein, the part in second information is stored in the storage area,
Wherein, the other parts in second information are stored in the data processing equipment, and
Wherein, a part second information that is stored in the storage area is combined into second information with other parts second information that is stored in the data processing equipment.
3. record as claimed in claim 1 and transcriber,
Wherein, data processing equipment has the cancellation processing section, second information in being stored in storage area is not to the effective electron device or effectively during the unique information of application software, the cancellation processing section utilizes second information that is stored in the storage area and the unique first information of recording medium at least and carries out cancellation, and
Wherein, the coupling part is configured to second information that is stored in the storage area is sent to data processing equipment.
4. record as claimed in claim 3 and transcriber,
Wherein, second information that sends is encrypted.
5. record as claimed in claim 1 and transcriber further comprise:
The cancellation processing section, wherein, second information in being stored in storage area is not to the effective electron device or effectively during the unique information of application software, and the cancellation processing section utilizes second information that is stored in the storage area and the unique first information of recording medium and carries out cancellation.
6. one kind is write down and transcriber, comprising:
In recording section and the reproducing part at least one, wherein, recording section is used for recording of encrypted data on recording medium, and reproducing part is used to reproduce the enciphered data that is recorded on the recording medium, and recording medium has its unique first information;
Storage area, this part are used to store unique second information of distributing to effective electron device or effective application software;
The key that the coupling part that is used for mutual verification msg treating apparatus, data processing equipment utilization produce according to the unique first information of recording medium and second information in the storage area that is stored in and enciphered data or enciphered data deciphered at least; And
The cancellation processing section, second information in being stored in storage area is not to the effective electron device or effectively during the unique information of application software, the cancellation processing section utilizes second information and the unique first information of recording medium and carries out cancellation, wherein, second information sends by the coupling part at least from data processing equipment, and is stored in the storage area.
7. record as claimed in claim 6 and transcriber further comprise:
Be used for deciphering parts that second information of encrypting is decrypted.
8. data processing equipment comprises:
Be used for verifying mutually the coupling part of record and transcriber, record and transcriber are used on recording medium the recording of encrypted data at least or reproduce enciphered data from it, and recording medium has only uniquely distributes to second information of effective electron device or effective application software and to its unique first information; And
The processing section, this part is utilized the key that produces according to the first information and electronic installation or the second unique information of application software and enciphered data or enciphered data deciphered at least, wherein, the first information to recording medium be unique and from the record and transcriber send by the coupling part.
9. data processing equipment as claimed in claim 8,
Wherein, the part in second information is stored in the storage area,
Wherein, the other parts in second information are stored in record and the transcriber, and
Wherein, a part second information that is stored in the storage area is combined into second information with other parts second information that is stored in the data processing equipment.
10. data processing equipment as claimed in claim 8,
Wherein, data processing equipment has the cancellation processing section, when second information is not that the cancellation processing section utilizes from record and transcriber and carries out cancellation by second information and the unique first information of recording medium of coupling part transmission to the effective electron device or effectively during the unique information of application software.
11. data processing equipment as claimed in claim 10 further comprises:
Be used for deciphering parts that second information of encrypting is decrypted.
12. data processing equipment as claimed in claim 8,
Wherein, data processing equipment is connected to record and the transcriber with cancellation processing section, when second information that stores is not to the effective electron device or effectively during the unique information of application software, the cancellation processing section utilizes second information that is stored at least in record and the transcriber and the unique first information of recording medium and carries out cancellation.
13. a data processing equipment comprises:
Storage area, this part are used to store only unique second information of distributing to effective electron device or effective application software;
Be used for the mutually coupling part of checking record and transcriber, write down and transcriber is used for being recorded in enciphered data on the recording medium in recording of encrypted data or reproduction on the recording medium at least, recording medium has its unique first information; And
The key that processing section, this part utilization produce according to the unique first information of recording medium and second information in the storage area that is stored in and enciphered data or to the enciphered data deciphering at least,
Wherein, second information that is stored in the storage area sends to record and the transcriber with cancellation processing section, second information in being stored in storage area is not that cancellation is carried out in the cancellation processing section to the effective electron device or effectively during the unique information of application software.
14. data processing equipment as claimed in claim 13,
Wherein, second information that sends is encrypted.
15. a record, reproduction and disposal system comprise:
Record and transcriber, this device is used for being recorded in enciphered data on the recording medium in recording of encrypted data or reproduction on the recording medium at least, recording medium has its unique first information, and record and transcriber have unique second information of distributing to effective electron device or effective application software; And
Data processing equipment, this device utilize the key that produces according to second information and the unique first information of recording medium and enciphered data or to the enciphered data deciphering, wherein, second information is stored in record and the transcriber at least at least.
16. record as claimed in claim 15, reproduction and disposal system,
Wherein, data processing equipment has the cancellation processing section, when wherein second information of being stored in is not to the effective electron device or effectively during the unique information of application software, the cancellation processing section utilizes the unique first information of recording medium and is stored in second information in the data processing equipment and carries out cancellation.
17. record as claimed in claim 15, reproduction and disposal system,
Wherein, record and transcriber have the cancellation processing section, when second information that stores is not to the effective electron device or effectively during the unique information of application software, the cancellation processing section utilizes the unique first information of recording medium and is stored in second information in the data processing equipment and carries out cancellation.
18. a record, reproduction and disposal system comprise:
Record and transcriber, this device is used to store only unique second information of distributing to effective electron device or effective application software, and be recorded in enciphered data on the recording medium in recording of encrypted data or reproduction on the recording medium at least, recording medium has its unique first information; And
Data processing equipment, this device utilize the key that produces according to second information and the unique first information of recording medium and enciphered data or to the enciphered data deciphering, wherein, second information storage in record and transcriber,
Wherein, data processing equipment is configured to second information that is stored in its storage area is sent to record and the transcriber with cancellation processing section, second information in being stored in record and transcriber is not that the cancellation processing section is carried out and cancelled to the effective electron device or effectively during the unique information of application software.
19. one kind is write down and transcriber, comprising:
In recording section and the reproducing part at least one, wherein, recording section is used for recording of encrypted data on recording medium, reproducing part is used for from the recording medium reproducing enciphered data, and record is used to cancel the first information of invalid electronic installation, the 3rd information that defines to the second unique information of each content, for each ciphering unit and the identification data unique to each pressing mold on recording medium;
Storage area, this part are used to store unique the 4th information of distributing to effective electron device or effective application software;
The cancellation processing section, this part determines according to the first information and the 4th information whether the 4th information that stores is to effective electron device or effective unique information of application software; And
Calculating section, determining the 4th information when the cancellation processing section is that calculating section obtains the intermediate key information unique to each recording medium according to the first information, the 4th information, second information and identification data to the effective electron device or effectively during the unique information of application software.
20. record as claimed in claim 19 and transcriber further comprise:
The key that the verification portion that is used for mutual verification msg treating apparatus, data processing equipment utilization produce according to intermediate key information and enciphered data or enciphered data deciphered at least; And
Intermediate key information encryption part, the bus key that this part utilization produces when being proved to be successful is encrypted middle key information, and sends the intermediate key information of encrypting to data processing equipment.
21. a data processing equipment comprises:
Be used to verify the verification portion of record and transcriber, record and transcriber be used at least to from recording medium recording with reproduce enciphered data, on recording medium record unique distribute to the effective electron device or effectively application software the 4th information, be used to cancel the first information of invalid electronic installation, to the second unique information of each content, be the 3rd information that defines of each ciphering unit and the identification data unique to each pressing mold;
The key information decryption portion, this part receives the intermediate key information unique to each recording medium from record and transcriber, intermediate key information produces according to the first information, the 4th information, second information and identification data, and identification data is used in the bus key that produces when being proved to be successful and encrypts;
Encryption key produces part, and this part utilization produces encryption key from the intermediate key information of the 3rd information of record and transcriber reception and deciphering; And
Encryption and decryption part, this part are carried out with encryption key at least and are encrypted or decipher with the encryption key execution.
CNB2003801001957A 2002-12-06 2003-12-04 Record regeneration device, data processing device and record regeneration processing system Expired - Fee Related CN100524253C (en)

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WO2004053699A3 (en) 2006-01-19
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AU2003289173A1 (en) 2004-06-30
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JPWO2004053699A1 (en) 2006-04-13
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US7500101B2 (en) 2009-03-03
CN100524253C (en) 2009-08-05

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